Good point @mreed. While cold temperatures are known to deter insects, or force them into hibernation, it does not kill all of them. It is very common for insects to be attracted to lights and other sources of heat.
Our Doorbells can certainly operate a slightly warmer temperature than the cold outdoors. This is especially true if the device is hardwired, or if it is a Doorbell Pro, as the steady flow of power can raise the device temp slightly.
If the orbs seem to be something other than an insect, such as a light glare, please check the environment for any reflective objects. Our support team is always available for further troubleshooting as well.
Insects seem like a logical explanation, but I've had my Ring doorbell installed for months so why are the insects just appearing now? And the fact that so many other homes are only just having insects appear at the same time? Seems rather peculiar.